680446461679 has 2 divisors, whose sum is σ = 680446461680. Its totient is φ = 680446461678.

The previous prime is 680446461661. The next prime is 680446461689. The reversal of 680446461679 is 976164644086.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 680446461679 - 2⁷ = 680446461551 is a prime.

It is a super-2 number, since 2×680446461679² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (680446461659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340223230839 + 340223230840.

It is an arithmetic number, because the mean of its divisors is an integer number (340223230840).

Almost surely, 2^680446461679 is an apocalyptic number.

680446461679 is a deficient number, since it is larger than the sum of its proper divisors (1).

680446461679 is an equidigital number, since it uses as much as digits as its factorization.

680446461679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41803776, while the sum is 61.

The spelling of 680446461679 in words is "six hundred eighty billion, four hundred forty-six million, four hundred sixty-one thousand, six hundred seventy-nine".